To read the full version of this content please select one of the options below:

Study of electrokinetic effects for heat transfer in microchannel with sinusoidal thermal boundary conditions

Muhammad Raees Ul Haq (School of Mathematical Sciences, Shanghai Jiao Tong University, Shanghai, China)
Hang Xu (State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China)
Liang Zhao (School of Mathematical Sciences, Shanghai Jiao Tong University, Shanghai, China)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 17 June 2019

Issue publication date: 17 October 2019

Abstract

Purpose

The purpose of this study is to obtain the numerical as well as regularity results for the nonlinear elliptic set of equations arising in the study of fluid flow in microchannel induced by the pressure in the presence of interfacial electrokinetic effects.

Design/methodology/approach

For the numerical study, the authors implemented traditional FDM approach, and for the regularity results they used the classical energy estimates. The interfacial electrokinetic effects result in an additional source term in classical momentum equation, hence affecting the characteristics of the flow and heat transfer. The sinusoidal temperature variation is assumed on side walls.

Findings

The results were obtained for various combinations of physical parameters appearing in the governing equations. This study concludes that in the presence of electric double layer, the average heat transfer rate reduces along with larger values of Reynolds number. It is observed that the heat transfer increases with the increase in amplitude ratio and phase deviation. The flow behavior and heat transfer rate inside the microchannel are also strongly affected by the presence of κ (kappa).

Originality/value

To the best of the authors’ knowledge, the problem of heat transfer through microchannel in combination with sinusoidal temperature variation at boundary with electric double layer effects has not been considered previously. Hence, this paper focuses on the influence of the sinusoidal boundary temperature distributions on both sidewalls of a rectangular microchannel through parallel plates with electrokinetic effects on the pressure-driven laminar flow. In addition, a detailed mathematical analysis is also to be carried out to verify the regularity of this model with the proposed boundary conditions. The study used the classical energy method to get the regularity results.

Keywords

Acknowledgements

The research of authors was supported in part by National Natural Science Foundation of China under grants 11231006 and 11571232, the Natural Science Foundation of Shanghai under grant 14ZR1423100, and Shanghai Committee of Science and Technology under grant 15XD1502300. H. Xu would like express his sincere gratitude for financial support of National Natural Science Foundation of China under Grant No. 11872241 and 11432009.

Citation

Raees Ul Haq, M., Xu, H. and Zhao, L. (2019), "Study of electrokinetic effects for heat transfer in microchannel with sinusoidal thermal boundary conditions", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 29 No. 10, pp. 3872-3892. https://doi.org/10.1108/HFF-04-2018-0179

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited